来自《耶鲁大学开放课程—哲学：死亡 第18集 第18集》

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  That could be changed,
  这个时刻可以变化
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  perhaps by having been delivered prematurely,
  比如早产
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  or through caesarean, or what have you.
  或者剖腹产 等等
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  We really mean the time at which I come into existence.
  我们是指我真正存在的那一刻
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  Let's suppose it's the time when the egg and the sperm join.
  我们假设这是精子卵子结合的那一刻
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  That's not a contingent moment in my story.
  对我来讲这不是一个偶然时刻
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  That's an essential moment in my life story.
  在我生命里这是一个必然时刻
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  How could that be?
  为什么这么说
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  We say, couldn't my parents have had sex earlier,
  难道我父母不能早点做爱吗
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  10 years earlier? Sure they could have.
  比如10年前 他们当然可能
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  But remember, if they had had sex 10 years earlier,
  但是记住 如果他们在10年前做爱
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  it would have been a different egg
  那就会是另一个卵子